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// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
'use strict';
var punycode = require('punycode');
var util = require('./util');
exports.parse = urlParse;
exports.resolve = urlResolve;
exports.resolveObject = urlResolveObject;
exports.format = urlFormat;
exports.Url = Url;
function Url() {
this.protocol = null;
this.slashes = null;
this.auth = null;
this.host = null;
this.port = null;
this.hostname = null;
this.hash = null;
this.search = null;
this.query = null;
this.pathname = null;
this.path = null;
this.href = null;
}
// Reference: RFC 3986, RFC 1808, RFC 2396
// define these here so at least they only have to be
// compiled once on the first module load.
var protocolPattern = /^([a-z0-9.+-]+:)/i,
portPattern = /:[0-9]*$/,
// Special case for a simple path URL
simplePathPattern = /^(\/\/?(?!\/)[^\?\s]*)(\?[^\s]*)?$/,
// RFC 2396: characters reserved for delimiting URLs.
// We actually just auto-escape these.
delims = ['<', '>', '"', '`', ' ', '\r', '\n', '\t'],
// RFC 2396: characters not allowed for various reasons.
unwise = ['{', '}', '|', '\\', '^', '`'].concat(delims),
// Allowed by RFCs, but cause of XSS attacks. Always escape these.
autoEscape = ['\''].concat(unwise),
// Characters that are never ever allowed in a hostname.
// Note that any invalid chars are also handled, but these
// are the ones that are *expected* to be seen, so we fast-path
// them.
nonHostChars = ['%', '/', '?', ';', '#'].concat(autoEscape),
hostEndingChars = ['/', '?', '#'],
hostnameMaxLen = 255,
hostnamePartPattern = /^[+a-z0-9A-Z_-]{0,63}$/,
hostnamePartStart = /^([+a-z0-9A-Z_-]{0,63})(.*)$/,
// protocols that can allow "unsafe" and "unwise" chars.
unsafeProtocol = {
'javascript': true,
'javascript:': true
},
// protocols that never have a hostname.
hostlessProtocol = {
'javascript': true,
'javascript:': true
},
// protocols that always contain a // bit.
slashedProtocol = {
'http': true,
'https': true,
'ftp': true,
'gopher': true,
'file': true,
'http:': true,
'https:': true,
'ftp:': true,
'gopher:': true,
'file:': true
},
querystring = require('querystring');
function urlParse(url, parseQueryString, slashesDenoteHost) {
if (url && util.isObject(url) && url instanceof Url) return url;
var u = new Url;
u.parse(url, parseQueryString, slashesDenoteHost);
return u;
}
Url.prototype.parse = function(url, parseQueryString, slashesDenoteHost) {
if (!util.isString(url)) {
throw new TypeError("Parameter 'url' must be a string, not " + typeof url);
}
// Copy chrome, IE, opera backslash-handling behavior.
// Back slashes before the query string get converted to forward slashes
// See: https://code.google.com/p/chromium/issues/detail?id=25916
var queryIndex = url.indexOf('?'),
splitter =
(queryIndex !== -1 && queryIndex < url.indexOf('#')) ? '?' : '#',
uSplit = url.split(splitter),
slashRegex = /\\/g;
uSplit[0] = uSplit[0].replace(slashRegex, '/');
url = uSplit.join(splitter);
var rest = url;
// trim before proceeding.
// This is to support parse stuff like " http://foo.com \n"
rest = rest.trim();
if (!slashesDenoteHost && url.split('#').length === 1) {
// Try fast path regexp
var simplePath = simplePathPattern.exec(rest);
if (simplePath) {
this.path = rest;
this.href = rest;
this.pathname = simplePath[1];
if (simplePath[2]) {
this.search = simplePath[2];
if (parseQueryString) {
this.query = querystring.parse(this.search.substr(1));
} else {
this.query = this.search.substr(1);
}
} else if (parseQueryString) {
this.search = '';
this.query = {};
}
return this;
}
}
var proto = protocolPattern.exec(rest);
if (proto) {
proto = proto[0];
var lowerProto = proto.toLowerCase();
this.protocol = lowerProto;
rest = rest.substr(proto.length);
}
// figure out if it's got a host
// user@server is *always* interpreted as a hostname, and url
// resolution will treat //foo/bar as host=foo,path=bar because that's
// how the browser resolves relative URLs.
if (slashesDenoteHost || proto || rest.match(/^\/\/[^@\/]+@[^@\/]+/)) {
var slashes = rest.substr(0, 2) === '//';
if (slashes && !(proto && hostlessProtocol[proto])) {
rest = rest.substr(2);
this.slashes = true;
}
}
if (!hostlessProtocol[proto] &&
(slashes || (proto && !slashedProtocol[proto]))) {
// there's a hostname.
// the first instance of /, ?, ;, or # ends the host.
//
// If there is an @ in the hostname, then non-host chars *are* allowed
// to the left of the last @ sign, unless some host-ending character
// comes *before* the @-sign.
// URLs are obnoxious.
//
// ex:
// http://a@b@c/ => user:a@b host:c
// http://a@b?@c => user:a host:c path:/?@c
// v0.12 TODO(isaacs): This is not quite how Chrome does things.
// Review our test case against browsers more comprehensively.
// find the first instance of any hostEndingChars
var hostEnd = -1;
for (var i = 0; i < hostEndingChars.length; i++) {
var hec = rest.indexOf(hostEndingChars[i]);
if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
hostEnd = hec;
}
// at this point, either we have an explicit point where the
// auth portion cannot go past, or the last @ char is the decider.
var auth, atSign;
if (hostEnd === -1) {
// atSign can be anywhere.
atSign = rest.lastIndexOf('@');
} else {
// atSign must be in auth portion.
// http://a@b/c@d => host:b auth:a path:/c@d
atSign = rest.lastIndexOf('@', hostEnd);
}
// Now we have a portion which is definitely the auth.
// Pull that off.
if (atSign !== -1) {
auth = rest.slice(0, atSign);
rest = rest.slice(atSign + 1);
this.auth = decodeURIComponent(auth);
}
// the host is the remaining to the left of the first non-host char
hostEnd = -1;
for (var i = 0; i < nonHostChars.length; i++) {
var hec = rest.indexOf(nonHostChars[i]);
if (hec !== -1 && (hostEnd === -1 || hec < hostEnd))
hostEnd = hec;
}
// if we still have not hit it, then the entire thing is a host.
if (hostEnd === -1)
hostEnd = rest.length;
this.host = rest.slice(0, hostEnd);
rest = rest.slice(hostEnd);
// pull out port.
this.parseHost();
// we've indicated that there is a hostname,
// so even if it's empty, it has to be present.
this.hostname = this.hostname || '';
// if hostname begins with [ and ends with ]
// assume that it's an IPv6 address.
var ipv6Hostname = this.hostname[0] === '[' &&
this.hostname[this.hostname.length - 1] === ']';
// validate a little.
if (!ipv6Hostname) {
var hostparts = this.hostname.split(/\./);
for (var i = 0, l = hostparts.length; i < l; i++) {
var part = hostparts[i];
if (!part) continue;
if (!part.match(hostnamePartPattern)) {
var newpart = '';
for (var j = 0, k = part.length; j < k; j++) {
if (part.charCodeAt(j) > 127) {
// we replace non-ASCII char with a temporary placeholder
// we need this to make sure size of hostname is not
// broken by replacing non-ASCII by nothing
newpart += 'x';
} else {
newpart += part[j];
}
}
// we test again with ASCII char only
if (!newpart.match(hostnamePartPattern)) {
var validParts = hostparts.slice(0, i);
var notHost = hostparts.slice(i + 1);
var bit = part.match(hostnamePartStart);
if (bit) {
validParts.push(bit[1]);
notHost.unshift(bit[2]);
}
if (notHost.length) {
rest = '/' + notHost.join('.') + rest;
}
this.hostname = validParts.join('.');
break;
}
}
}
}
if (this.hostname.length > hostnameMaxLen) {
this.hostname = '';
} else {
// hostnames are always lower case.
this.hostname = this.hostname.toLowerCase();
}
if (!ipv6Hostname) {
// IDNA Support: Returns a punycoded representation of "domain".
// It only converts parts of the domain name that
// have non-ASCII characters, i.e. it doesn't matter if
// you call it with a domain that already is ASCII-only.
this.hostname = punycode.toASCII(this.hostname);
}
var p = this.port ? ':' + this.port : '';
var h = this.hostname || '';
this.host = h + p;
this.href += this.host;
// strip [ and ] from the hostname
// the host field still retains them, though
if (ipv6Hostname) {
this.hostname = this.hostname.substr(1, this.hostname.length - 2);
if (rest[0] !== '/') {
rest = '/' + rest;
}
}
}
// now rest is set to the post-host stuff.
// chop off any delim chars.
if (!unsafeProtocol[lowerProto]) {
// First, make 100% sure that any "autoEscape" chars get
// escaped, even if encodeURIComponent doesn't think they
// need to be.
for (var i = 0, l = autoEscape.length; i < l; i++) {
var ae = autoEscape[i];
if (rest.indexOf(ae) === -1)
continue;
var esc = encodeURIComponent(ae);
if (esc === ae) {
esc = escape(ae);
}
rest = rest.split(ae).join(esc);
}
}
// chop off from the tail first.
var hash = rest.indexOf('#');
if (hash !== -1) {
// got a fragment string.
this.hash = rest.substr(hash);
rest = rest.slice(0, hash);
}
var qm = rest.indexOf('?');
if (qm !== -1) {
this.search = rest.substr(qm);
this.query = rest.substr(qm + 1);
if (parseQueryString) {
this.query = querystring.parse(this.query);
}
rest = rest.slice(0, qm);
} else if (parseQueryString) {
// no query string, but parseQueryString still requested
this.search = '';
this.query = {};
}
if (rest) this.pathname = rest;
if (slashedProtocol[lowerProto] &&
this.hostname && !this.pathname) {
this.pathname = '/';
}
//to support http.request
if (this.pathname || this.search) {
var p = this.pathname || '';
var s = this.search || '';
this.path = p + s;
}
// finally, reconstruct the href based on what has been validated.
this.href = this.format();
return this;
};
// format a parsed object into a url string
function urlFormat(obj) {
// ensure it's an object, and not a string url.
// If it's an obj, this is a no-op.
// this way, you can call url_format() on strings
// to clean up potentially wonky urls.
if (util.isString(obj)) obj = urlParse(obj);
if (!(obj instanceof Url)) return Url.prototype.format.call(obj);
return obj.format();
}
Url.prototype.format = function() {
var auth = this.auth || '';
if (auth) {
auth = encodeURIComponent(auth);
auth = auth.replace(/%3A/i, ':');
auth += '@';
}
var protocol = this.protocol || '',
pathname = this.pathname || '',
hash = this.hash || '',
host = false,
query = '';
if (this.host) {
host = auth + this.host;
} else if (this.hostname) {
host = auth + (this.hostname.indexOf(':') === -1 ?
this.hostname :
'[' + this.hostname + ']');
if (this.port) {
host += ':' + this.port;
}
}
if (this.query &&
util.isObject(this.query) &&
Object.keys(this.query).length) {
query = querystring.stringify(this.query);
}
var search = this.search || (query && ('?' + query)) || '';
if (protocol && protocol.substr(-1) !== ':') protocol += ':';
// only the slashedProtocols get the //. Not mailto:, xmpp:, etc.
// unless they had them to begin with.
if (this.slashes ||
(!protocol || slashedProtocol[protocol]) && host !== false) {
host = '//' + (host || '');
if (pathname && pathname.charAt(0) !== '/') pathname = '/' + pathname;
} else if (!host) {
host = '';
}
if (hash && hash.charAt(0) !== '#') hash = '#' + hash;
if (search && search.charAt(0) !== '?') search = '?' + search;
pathname = pathname.replace(/[?#]/g, function(match) {
return encodeURIComponent(match);
});
search = search.replace('#', '%23');
return protocol + host + pathname + search + hash;
};
function urlResolve(source, relative) {
return urlParse(source, false, true).resolve(relative);
}
Url.prototype.resolve = function(relative) {
return this.resolveObject(urlParse(relative, false, true)).format();
};
function urlResolveObject(source, relative) {
if (!source) return relative;
return urlParse(source, false, true).resolveObject(relative);
}
Url.prototype.resolveObject = function(relative) {
if (util.isString(relative)) {
var rel = new Url();
rel.parse(relative, false, true);
relative = rel;
}
var result = new Url();
var tkeys = Object.keys(this);
for (var tk = 0; tk < tkeys.length; tk++) {
var tkey = tkeys[tk];
result[tkey] = this[tkey];
}
// hash is always overridden, no matter what.
// even href="" will remove it.
result.hash = relative.hash;
// if the relative url is empty, then there's nothing left to do here.
if (relative.href === '') {
result.href = result.format();
return result;
}
// hrefs like //foo/bar always cut to the protocol.
if (relative.slashes && !relative.protocol) {
// take everything except the protocol from relative
var rkeys = Object.keys(relative);
for (var rk = 0; rk < rkeys.length; rk++) {
var rkey = rkeys[rk];
if (rkey !== 'protocol')
result[rkey] = relative[rkey];
}
//urlParse appends trailing / to urls like http://www.example.com
if (slashedProtocol[result.protocol] &&
result.hostname && !result.pathname) {
result.path = result.pathname = '/';
}
result.href = result.format();
return result;
}
if (relative.protocol && relative.protocol !== result.protocol) {
// if it's a known url protocol, then changing
// the protocol does weird things
// first, if it's not file:, then we MUST have a host,
// and if there was a path
// to begin with, then we MUST have a path.
// if it is file:, then the host is dropped,
// because that's known to be hostless.
// anything else is assumed to be absolute.
if (!slashedProtocol[relative.protocol]) {
var keys = Object.keys(relative);
for (var v = 0; v < keys.length; v++) {
var k = keys[v];
result[k] = relative[k];
}
result.href = result.format();
return result;
}
result.protocol = relative.protocol;
if (!relative.host && !hostlessProtocol[relative.protocol]) {
var relPath = (relative.pathname || '').split('/');
while (relPath.length && !(relative.host = relPath.shift()));
if (!relative.host) relative.host = '';
if (!relative.hostname) relative.hostname = '';
if (relPath[0] !== '') relPath.unshift('');
if (relPath.length < 2) relPath.unshift('');
result.pathname = relPath.join('/');
} else {
result.pathname = relative.pathname;
}
result.search = relative.search;
result.query = relative.query;
result.host = relative.host || '';
result.auth = relative.auth;
result.hostname = relative.hostname || relative.host;
result.port = relative.port;
// to support http.request
if (result.pathname || result.search) {
var p = result.pathname || '';
var s = result.search || '';
result.path = p + s;
}
result.slashes = result.slashes || relative.slashes;
result.href = result.format();
return result;
}
var isSourceAbs = (result.pathname && result.pathname.charAt(0) === '/'),
isRelAbs = (
relative.host ||
relative.pathname && relative.pathname.charAt(0) === '/'
),
mustEndAbs = (isRelAbs || isSourceAbs ||
(result.host && relative.pathname)),
removeAllDots = mustEndAbs,
srcPath = result.pathname && result.pathname.split('/') || [],
relPath = relative.pathname && relative.pathname.split('/') || [],
psychotic = result.protocol && !slashedProtocol[result.protocol];
// if the url is a non-slashed url, then relative
// links like ../.. should be able
// to crawl up to the hostname, as well. This is strange.
// result.protocol has already been set by now.
// Later on, put the first path part into the host field.
if (psychotic) {
result.hostname = '';
result.port = null;
if (result.host) {
if (srcPath[0] === '') srcPath[0] = result.host;
else srcPath.unshift(result.host);
}
result.host = '';
if (relative.protocol) {
relative.hostname = null;
relative.port = null;
if (relative.host) {
if (relPath[0] === '') relPath[0] = relative.host;
else relPath.unshift(relative.host);
}
relative.host = null;
}
mustEndAbs = mustEndAbs && (relPath[0] === '' || srcPath[0] === '');
}
if (isRelAbs) {
// it's absolute.
result.host = (relative.host || relative.host === '') ?
relative.host : result.host;
result.hostname = (relative.hostname || relative.hostname === '') ?
relative.hostname : result.hostname;
result.search = relative.search;
result.query = relative.query;
srcPath = relPath;
// fall through to the dot-handling below.
} else if (relPath.length) {
// it's relative
// throw away the existing file, and take the new path instead.
if (!srcPath) srcPath = [];
srcPath.pop();
srcPath = srcPath.concat(relPath);
result.search = relative.search;
result.query = relative.query;
} else if (!util.isNullOrUndefined(relative.search)) {
// just pull out the search.
// like href='?foo'.
// Put this after the other two cases because it simplifies the booleans
if (psychotic) {
result.hostname = result.host = srcPath.shift();
//occationaly the auth can get stuck only in host
//this especially happens in cases like
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
var authInHost = result.host && result.host.indexOf('@') > 0 ?
result.host.split('@') : false;
if (authInHost) {
result.auth = authInHost.shift();
result.host = result.hostname = authInHost.shift();
}
}
result.search = relative.search;
result.query = relative.query;
//to support http.request
if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
result.path = (result.pathname ? result.pathname : '') +
(result.search ? result.search : '');
}
result.href = result.format();
return result;
}
if (!srcPath.length) {
// no path at all. easy.
// we've already handled the other stuff above.
result.pathname = null;
//to support http.request
if (result.search) {
result.path = '/' + result.search;
} else {
result.path = null;
}
result.href = result.format();
return result;
}
// if a url ENDs in . or .., then it must get a trailing slash.
// however, if it ends in anything else non-slashy,
// then it must NOT get a trailing slash.
var last = srcPath.slice(-1)[0];
var hasTrailingSlash = (
(result.host || relative.host || srcPath.length > 1) &&
(last === '.' || last === '..') || last === '');
// strip single dots, resolve double dots to parent dir
// if the path tries to go above the root, `up` ends up > 0
var up = 0;
for (var i = srcPath.length; i >= 0; i--) {
last = srcPath[i];
if (last === '.') {
srcPath.splice(i, 1);
} else if (last === '..') {
srcPath.splice(i, 1);
up++;
} else if (up) {
srcPath.splice(i, 1);
up--;
}
}
// if the path is allowed to go above the root, restore leading ..s
if (!mustEndAbs && !removeAllDots) {
for (; up--; up) {
srcPath.unshift('..');
}
}
if (mustEndAbs && srcPath[0] !== '' &&
(!srcPath[0] || srcPath[0].charAt(0) !== '/')) {
srcPath.unshift('');
}
if (hasTrailingSlash && (srcPath.join('/').substr(-1) !== '/')) {
srcPath.push('');
}
var isAbsolute = srcPath[0] === '' ||
(srcPath[0] && srcPath[0].charAt(0) === '/');
// put the host back
if (psychotic) {
result.hostname = result.host = isAbsolute ? '' :
srcPath.length ? srcPath.shift() : '';
//occationaly the auth can get stuck only in host
//this especially happens in cases like
//url.resolveObject('mailto:local1@domain1', 'local2@domain2')
var authInHost = result.host && result.host.indexOf('@') > 0 ?
result.host.split('@') : false;
if (authInHost) {
result.auth = authInHost.shift();
result.host = result.hostname = authInHost.shift();
}
}
mustEndAbs = mustEndAbs || (result.host && srcPath.length);
if (mustEndAbs && !isAbsolute) {
srcPath.unshift('');
}
if (!srcPath.length) {
result.pathname = null;
result.path = null;
} else {
result.pathname = srcPath.join('/');
}
//to support request.http
if (!util.isNull(result.pathname) || !util.isNull(result.search)) {
result.path = (result.pathname ? result.pathname : '') +
(result.search ? result.search : '');
}
result.auth = relative.auth || result.auth;
result.slashes = result.slashes || relative.slashes;
result.href = result.format();
return result;
};
Url.prototype.parseHost = function() {
var host = this.host;
var port = portPattern.exec(host);
if (port) {
port = port[0];
if (port !== ':') {
this.port = port.substr(1);
}
host = host.substr(0, host.length - port.length);
}
if (host) this.hostname = host;
};